How to choose the power supply module for Mitsubishi Q series PLC?
In the previous article, we introduced the CPU modules and boards of the Mitsubishi Q series PLC. Today, we will discuss the power supply modules of the Q series PLC. Power supply is a fundamental prerequisite for a control system, and a reliable power supply module can provide strong assurance for the system's operation, reducing various unknown faults caused by unstable power supply. So, what power supply modules does Mitsubishi Electric offer for the Q series PLC?
Q series PLC power supply modules include Q61P-A1, Q61P-A2, Q61P, Q62P, Q63P, Q64P, and so on. In the names, "Q" represents the Q series PLC; "6" stands for power, and the following numbers are model identifiers; "P" represents "Power."
Different models of power supplies have varying input voltage requirements and current characteristics. Some require AC (alternating current) input, while others require DC (direct current) input. For example, Q61P-A1 takes input from 100 to 120V AC, while Q63P requires 24V DC input. Below is a summary table of the input voltage/frequency and output voltage/current for these power supply modules:
Q62P can provide two voltage outputs: DC24V and DC5V. DC5V is supplied through the backplane with a maximum current of 3A, while DC24V is provided through external terminal connections with a maximum current of 0.6A. Please refer to the diagram below:
Q63P is a power supply module designed to accept DC 24V input (notice that other modules typically accept AC input). It can output a maximum current of 6A at DC 5V, as illustrated below:
The above-mentioned power supply modules are suitable for the main baseboard (Q3XB) and expansion baseboards that require power modules (Q6XB), where "X" represents the number of modules, for example, Q312B. They are not compatible with expansion baseboards (Q5XB) that cannot accommodate power supply modules. Additionally, they are not suitable for the ultra-thin main baseboard (Q3XSB). For ultra-thin main baseboards, the slim power supply module Q61SP is required. This module, designed specifically for ultra-thin main baseboards, has a slender form and can provide a maximum current of 2A at DC5V, as shown in the diagram below:
In addition, the Q series PLC power supply modules also include Q63RP and Q64RP for redundant baseboards.
When selecting a power supply module, besides ensuring compatibility with the used baseboard, there is another crucial principle: the total current consumption of all modules on the baseboard must not exceed the maximum current that the power supply module can provide.
The correct approach is to first calculate the current consumption of all modules in the system (DC5V), and then choose a suitable power supply module.
That concludes the discussion on selecting power supply modules. In previous articles, we also discussed the selection of Siemens power supply modules, which you may find useful:
- Mitsubishi Q Series PLC CPU Selection Guide
- What are Mitsubishi Q Series PLC Boards? How to choose?
- S7-1200 Hardware Guide: How to Choose a Power Supply Module